TM 1-1520-238-T-6
9–451
9–197. POWER ENG 2 CIRCUIT BREAKER (CB44) – DOES NOT STAY CLOSED OR 115 VAC
9–197
IS NOT PRESENT AT P1-23
Tools:
Nomenclature
Part Number
Tool Kit, Electrical
SC518099CLA06
Repairer’s
Multimeter, Digital
AN/PSM-45
Personnel Required:
68X
Armament/Electrical Systems Repairer
One person to assist
References:
TM 1-1520-238-23
TM 1-1520-238-T-4
WARNING
Turn off power before detaching or
attaching wires and connectors. High
current 28 VDC or 115 VAC is present.
Failure to do so could result in death or
serious injury.
1. On pilot ELEC PWR panel, set BATT/EXT PWR
switch to EXT PWR.
Does POWER ENG 2 circuit breaker (CB44)
stay closed?
YES
Go to step 2.
NO
Go to step 3.
2. Set BATT/EXT PWR switch to OFF. Check for
short between:
CB88-C1 and CB44-1,
P1-23 and CB44-2.
Does open exist?
YES
Repair open wire.
Go to paragraph 9–189.
NO
Replace POWER ENG 2 circuit
breaker (CB44)
(TM 1-1520-238-23).
3. Open CB44 and set BATT/EXT PWR switch to
OFF. Check for short between P1-23 and
ground.
Does short exist?
YES
Go to step 4.
NO
Refer to TM 1-1520-238-T-4 to
troubleshoot engine 2 power
plant.
4. Detach wire at CB44-2. Check for short between
P1-23 and ground.
Does short exist?
YES
Repair shorted wire.
Go to paragraph 9–189.
NO
Replace POWER ENG 2 circuit
breaker (CB44)
(TM 1-1520-238-23).
END OF TASK
